Lenze is a widely recognized brand that manufactures a full range of high quality drives, motion control, and automation technology for a variety of industries. 

Control Concepts has years of experience repairing a range of Lenze products, including both new and older drives that are no longer in production. 

Contact us for help with your Lenze drives.

The Lenze line of products includes:

  • AC drives
  • DC drives
  • Servo drives
  • Motion Controllers

Lenze offers three-phase AC motors for mains operation and frequency inverter operation, covering a power range from 0.12 to 45 kW. Lenze also offers scalable inverters for speed and torque-controlled motion and for position-controlled single axis and multi-axis motions.

Lenze's range of products help meet the needs of any speed control application.

Lenze and AC Tech

Lenze acquired drive technology manufacturing company AC Tech, or AC Technology Corporation, in 1999. Control Concepts services both Lenze and AC Tech products, including drives that are no longer in production.

Lenze/AC Tech drive and automation solutions support many industries, including:

  • Automotive
  • Warehouse logistics
  • Airport logistics
  • Packing
  • Converting and printing
  • Textiles

After the brand's foundation in 1947, Lenze grew from a local trading company to a global provider of reliable and flexible drive and automation technologies.

Control Concepts has over 30 years of experience in Lenze drive repair, service, and support.

Common Drive Failures

  • Software or programming problems
  • Non-functional cooling fans
  • Loose connections
  • Drive keeps blowing fuses or tripping breakers
  • Drive doesn’t run motor
  • Circuit board failure

Circuit board failure is the least common reason for drive failures. The most common fault that shuts down a drive is an over-current fault, of which there are 20-30 causes. We start with the dynamics of the motor and move on from there.

The Control Concepts Repair Process

We check the motor drive and terminals for substandard connections which can be caused by anything from heat cycles and mechanical vibration to reusing or over-tightening torque screws.

We conduct diode and IGBT tests on the input/output power sections before applying power to the drive unit. This is to protect against further damage from a short circuit.

We power up the unit and perform amp readings and output frequency tests, slowly increasing the voltage until the rated input voltage of the drive is reached.

If everything functions properly, we use the drive to run a motor through basic jog functions after backing up existing programs. If the motor does not run, we check the output voltages and current ratings going to the motor to check drive function for motor rotation.

Most drive failures can be avoided through preventative maintenance.

  • Keep the drive free of dust
  • Ensure proper ventilation to prevent overheating
  • Keep everything dry and protected from moisture

Call us for more information or to schedule service.